Results: Vasa recta in jejunum frequently divided into three branches-two long and one short branches,in the ileum,it often divied into two branches-one long and one short branches.

• 结果： 正常小肠动脉分布具有一定规律性，空肠段直动脉通常分为三支(两长支，一短支)，回肠段直动脉通常分为两支(长、短各一)。